I was going to purchase it before Christmas Ron, along with the Lensmaster RH-2 Gimbal, but cash-flow held it up until now. Originally, I was going to buy from HDEW (US Imports) but then I saw a used...

Very last minute I know but wondered if anyone could give me some advice on how to capture the images for stacking. Tonight is super moon night and I wasn't going to bother but the forecast is for a...

The difference in the amount of light admitted (for a given exposure time) for an aperture change of 1 stop is a factor of 2 i.e half or double the amount. That means the surface area of the aperture...